Pointing device with an adaptive lighting levels fade

摘要

A pointing device and a method for operating the same are disclosed. The pointing device comprises a lighting system, a camera system and a control system. The illumination system illuminates a surface over which the pointing device moves. The illumination system generates a light level by means of an illumination control signal is determined. The camera has a plurality of images of the illuminated surface. The control of a first and a second image on which, due to the camera be made at different times, and determines a displacement, which indicates the direction and the distance, which the positioning device is moved between the two different times. The controller also generates the illumination control signal. The illumination control signal depends on at least one of the images, which are recorded by means of the camera system. In one exemplary embodiment, the surface is characterized by a reflection capacity, and the light level, which is generated by the illumination system refers vice versa on this reflection capability.